wiki:EmailApplicationServerInJail

Version 2 (modified by Rick van der Zwet, 8 weeks ago) (diff)

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Links Used

Mailman

To avoid backscatter on mailman instances use the following parameters

subscribe_policy = 2
respond_to_post_requests = 0
reject_these_nonmember = []
generic_nonmember_action = 3
forward_auto_discards = 1

Also make sure the owner addresses have trust rules for mail coming from mail-man, since all (bounce) spam gets forwarded to the address. If you for example use a free account at BigCorp, you end up getting your mailman instance blacklisted in RBL rules due to backscatter SPAM and 'spammy' forwards.